JFE-680

General Information
Thank you for purchasing the Japan Radio Co., Ltd. JFE-680 Echo-Sounder. The JFE-680
conforms to the IMO (International Maritime Organization) performance standards, enabling
seabed displays and digital depth displays.
Before attempting to operate this equipment, read this instruction manual thoroughly to
ensure correct and safe operation in accordance with the warning instructions and operation
procedures.
You are strongly recommended to store this instruction manual carefully for future reference.
In the event that you have an operational problem or malfunction, this manual will provide
useful instructions
General Information i